Method for transmitting signal using terminal mobility-based precoder cycle technique, and apparatus therefor

Abstract

The present application discloses a method for transmitting a signal from a transmitting end to a receiving end in a wireless communication system. Specifically, the method comprises the steps of: configuring a precoder set including one or more precoders; precoding the signal by cyclically applying the one or more precoders in a specific resource unit; and transmitting the precoded signal to the receiving end, wherein at least one of the size of the precoder set and the one or more precoders is determined on the basis of the mobility of the receiving end.

The invention claimed is: 
     
       1. A method of transmitting a signal from a transmission end to a reception end in a wireless communication system, the method comprising:
 receiving information on at least one preferred precoder from the reception end; 
 setting a reference precoder set within a predetermined beamforming angle range based on the at least one preferred precoder; 
 composing a precoder set including one or more precoders from the reference precoder set based on a mobility of the reception end; 
 cycling and applying the one or more precoders in specific resource units to precode the signal; and 
 transmitting the precoded signal to the reception end, 
 wherein at least one of a size of the precoder set and the one or more precoders is determined based on the mobility of the reception end. 
 
     
     
       2. The method according to  claim 1 , wherein a beam width of the precoded signal when the receiving end has high mobility is larger than the beam width of the precoded signal when the receiving end has low mobility. 
     
     
       3. The method according to  claim 1 , wherein the composing the precoder set includes selecting one or more precoders based on the at least one preferred precoder. 
     
     
       4. The method according to  claim 1 , wherein the composing the precoder set includes:
 selecting at least one specific precoder based on the mobility of the reception end; and 
 selecting one or more precoders based on the at least one specific precoder. 
 
     
     
       5. The method according to  claim 1 , further comprising:
 transmitting information on the precoder set to the reception end, 
 wherein the information on the precoder set includes sorting information of the one or more precoders included in the precoder set. 
 
     
     
       6. The method according to  claim 1 , wherein each of the specific resource units is one of a frequency resource unit or a time resource unit. 
     
     
       7. A transmission apparatus in a wireless communication system to transmit a signal from a transmission end to a reception end, the transmission apparatus comprising:
 a radio frequency (RF) transceiver; and 
 a processor, 
 wherein the processor is configured to:
 control the RF transceiver to receive information on at least one preferred precoder from the reception end, 
 set a reference precoder set within a predetermined beamforming angle range based on the at least one preferred precoder, 
 compose a precoder set including one or more precoders from the reference precoder set based on a mobility of the reception end, 
 cycle and apply the one or more precoders in specific resource units to precode the signal, and 
 control the RF transceiver to transmit the precoded signal to the reception end, 
 
 wherein at least one of a size of the precoder set and the one or more precoders is determined based on the mobility of the reception end. 
 
     
     
       8. The transmission apparatus according to  claim 7 , wherein a beam width of the precoded signal when the receiving end has high mobility is larger than the beam width of the precoded signal when the receiving end has low mobility. 
     
     
       9. The transmission apparatus according to  claim 7 , wherein the processor selects one or more precoders based on at least one preferred precoder received from the reception apparatus. 
     
     
       10. The transmission apparatus according to  claim 7 , wherein the processor selects one or more precoders based on at least one specific precoder selected based on the mobility of the reception apparatus. 
     
     
       11. The transmission apparatus according to  claim 7 , wherein information on the precoder set is provided to the reception apparatus, and
 wherein the information on the precoder set includes sorting information of the one or more precoders included in the precoder set. 
 
     
     
       12. The transmission apparatus according to  claim 7 , wherein each of the specific resource units is one of a frequency resource unit or a time resource unit.